CVE-2026-31743
Analyzed Analyzed - Analysis Complete
Buffer Overflow in Linux Kernel NVMEM Driver

Publication date: 2026-05-01

Last updated on: 2026-05-07

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: nvmem: zynqmp_nvmem: Fix buffer size in DMA and memcpy Buffer size used in dma allocation and memcpy is wrong. It can lead to undersized DMA buffer access and possible memory corruption. use correct buffer size in dma_alloc_coherent and memcpy.
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Meta Information
Published
2026-05-01
Last Modified
2026-05-07
Generated
2026-06-16
AI Q&A
2026-05-01
EPSS Evaluated
2026-06-15
NVD
CVE-2026-31743
EUVD
EUVD-2026-26556
Affected Vendors & Products
Showing 9 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel From 6.13 (inc) to 6.18.22 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.12 (exc)
linux linux_kernel From 6.9 (inc) to 6.12.81 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability exists in the Linux kernel's nvmem subsystem, specifically in the zynqmp_nvmem component. The issue is that the buffer size used during DMA (Direct Memory Access) allocation and memcpy operations is incorrect. This incorrect buffer size can cause undersized DMA buffer access, which may lead to memory corruption.

Impact Analysis

The impact of this vulnerability is potential memory corruption due to undersized DMA buffer access. Memory corruption can cause system instability, crashes, or unpredictable behavior, which may affect the reliability and security of systems running the affected Linux kernel.

Mitigation Strategies

The vulnerability involves incorrect buffer size usage in dma_alloc_coherent and memcpy in the Linux kernel's nvmem zynqmp_nvmem driver, which can lead to memory corruption.

To mitigate this vulnerability, you should update your Linux kernel to a version where this issue has been fixed.

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